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\title{Exploiting Antenna Directivity in\\
  Wireless NoC Architectures} 

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\begin{abstract}
Wireless Network-on-Chip (WiNoC) is an emerging on-chip communication
paradigm and a candidate solution for dealing with the scalability
problems which affect current and next generation manycore
architectures. In a WiNoC, the transceivers that allow the conversion
between electrical and radio signals, account for a significant
fraction of the total communication energy budget. In particular, the
transmitting power for wireless communications is strongly affected by
the orientation of the antennas. This paper studies the impact of
antennas orientation on energy figures of a WiNoC architecture and
performs a design space exploration for determining the optimal
orientation of the antennas in such a way to minimize the
communication energy consumption. Experiments have been carried out on
state-of-the-art WiNoC topologies, on both synthetic and real traffic
scenarios, and validated by means of a commercial field solver
simulator. When the antennas are optimally oriented, up to 80\% energy
saving (as compared to the case in which antennas have all the same
orientation) has been observed.
\end{abstract}

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